Quote Originally Posted by moombadaze View Post
ok, that makes sense.

Can you point me in the direction for a tuned port box for my 12" Exile sub that wont break the bank.
Many operations that sell a particular brand of woofer will also build custom enclosures to suit. And that begins with properly fitting the boat. ? Because it does you little good if the box is too large or you must give up more leg room than you are willing to.
Every woofer has a set of specs called Thiele/Small Parameters in the manual. From those specs you design the correct ported enclosure (which is really a tuned resonator). The question is whether or not it is actually "tuned" with any degree of precision (as discussed above). And you as the end user, can have some input on how it performs. For instance, you could say I want maximum bass output....period. Or, you could say I want more output than sealed but I also want a defined tight sounding bass similar to sealed. And the designer, aided by the right computer and software, would input your preferences. Then he would model that box to see if it fits your particular boat. If all goes well then he builds you the box. Since it is hard to do this without the boat you should really find a local shop that specializes in cabinet construction whether car or boat. It's certainly easy enough to marinize an enclosure for a boat application.
Odin with Earmark Marine has a well defined sequence to handle all this for his customers. They (the do-it-yourselfer) are required to get involved, make some measurements and verify a few things so that the final enclosure build will fit. He's been doing this for a very long time and has a good process. And it is a more difficult process to manage for an enclosure that has to be shipped. But in the end it is right and sounds great.
In your case, since you already own the woofer, and because it's not a cookie cutter build, you should find a local guy that can access your boat.